360 lines
11 KiB
C++
360 lines
11 KiB
C++
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Mark Guerra
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this
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* software and associated documentation files (the "Software"), to deal in the Software
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* without restriction, including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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* to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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* AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef BIGNUMBER_H
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#define BIGNUMBER_H
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#include <vector>
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#include <string>
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#include <iostream>
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/**
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* BigNumber class
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*/
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class BigNumber {
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public:
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//@{
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/**
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* BigNumber constructor
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* @param number - The initial value of the BigNumber
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*/
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BigNumber(std::string number);
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BigNumber(long long number);
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//@}
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/**
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* Add another BigNumber to the current instance
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* @param other - The other BigNumber
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* @return The sum of the two BigNumbers
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*/
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BigNumber add(BigNumber other);
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/**
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* Subtract another BigNumber from the current instance
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* @param other - The other BigNumber
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* @return The difference of the two BigNumbers
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*/
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BigNumber subtract(BigNumber other);
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/**
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* Multiply the current instance by another BigNumber
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* @param other - The other BigNumber
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* @return The product of the two BigNumbers
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*/
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BigNumber multiply(BigNumber other);
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/**
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* Divide the current instance by another BigNumber
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* @param other - The other BigNumber
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* @return The quotient of the two BigNumbers
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*/
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BigNumber divide(BigNumber other);
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/**
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* Raise the current instance to the power of an exponent
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* @param exponent - The power to be raised by
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* @return - The resulting BigNumber after exponentiation
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*/
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BigNumber pow(int exponent);
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/**
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* Get the string value of the current instance
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* @return The BigNumber as a string
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*/
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std::string getString();
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/**
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* Set the value of the current instance with a string
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* @param newStr - The new value for the BigNumber
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* @return The BigNumber with the new value
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*/
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BigNumber setString(const std::string &newStr);
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/**
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* Negates the current instance
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* @return The BigNumber after negation
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*/
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BigNumber negate();
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BigNumber trimLeadingZeros();
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//@{
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/**
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* Check if another BigNumber is equal to the current instance
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* @param other - The other BigNumber
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* @return True if equal, otherwise false
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*/
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bool equals(const BigNumber &other);
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bool equals(const long long &other);
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bool equals(const std::string &other);
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//@}
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/**
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* Get the number of digits in the current instance
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* @return The number of digits
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*/
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unsigned int digits();
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/**
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* Get whether or not the current instance is a negative number
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* @return True if negative, otherwise false
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*/
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bool isNegative() const;
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/**
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* Get whether or not the current instance is a positive number
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* @return True if positive, otherwise false
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*/
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bool isPositive();
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/**
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* Get whether or not the current instance is an even number
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* @return True if even, otherwise false
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*/
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bool isEven();
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/**
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* Get whether or not the current instance is an odd number
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* @return True if odd, otherwise false
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*/
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bool isOdd();
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/**
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* Get the absolute value of the current instance
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* @return The absolute value of the BigNumber
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*/
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BigNumber abs() const;
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/**
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* Output stream operator
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* @param os The output stream
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* @param num The current instance
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* @return The output stream with the current instance
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*/
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friend std::ostream &operator<<(std::ostream &os, const BigNumber &num);
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//@{
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/**
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* Addition operator
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* @param b1 - The current instance
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* @param b2 - The number being added
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* @return The sum of the two numbers
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*/
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friend BigNumber operator+(BigNumber b1, const BigNumber &b2);
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friend BigNumber operator+(BigNumber b1, const long long &b2);
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friend BigNumber operator+(BigNumber b1, const std::string &b2);
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//@}
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//@{
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/**
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* Subtraction operator
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* @param b1 - The current instance
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* @param b2 - The number being subtracted
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* @return The difference of the two numbers
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*/
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friend BigNumber operator-(BigNumber b1, const BigNumber &b2);
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friend BigNumber operator-(BigNumber b1, const long long &b2);
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friend BigNumber operator-(BigNumber b1, const std::string &b2);
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//@}
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//@{
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/**
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* Multiplication operator
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* @param b1 - The current instance
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* @param b2 - The number being multiplied by
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* @return The product of the two numbers
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*/
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friend BigNumber operator*(BigNumber b1, const BigNumber &b2);
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friend BigNumber operator*(BigNumber b1, const long long &b2);
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friend BigNumber operator*(BigNumber b1, const std::string &b2);
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//@}
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//@{
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/**
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* Division operator
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* @param b1 - The current instance
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* @param b2 - The number being divided by
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* @return The quotient of the two numbers
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*/
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friend BigNumber operator/(BigNumber b1, const BigNumber &b2);
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friend BigNumber operator/(BigNumber b1, const long long &b2);
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friend BigNumber operator/(BigNumber b1, const std::string &b2);
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//@}
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/**
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* Exponent operator
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* @param b1 - The current instance
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* @param b2 - The exponent
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* @return The value after exponentiation
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*/
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friend BigNumber operator^(BigNumber b1, const int &b2);
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//@{
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/**
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* Equality operator
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* @param b1 - The current instance
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* @param b2 - Another value
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* @return True if equal, otherwise false
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*/
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friend bool operator==(BigNumber b1, const BigNumber &b2);
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friend bool operator==(BigNumber b1, const long long &b2);
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friend bool operator==(BigNumber b1, const std::string &b2);
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//@}
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/**
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* Greater-than operator
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* @param b1 - The current instance
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* @param b2 - Another BigNumber
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* @return True if current instance is greater, otherwise false
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*/
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friend bool operator>(BigNumber b1, const BigNumber &b2);
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/**
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* Less-than operator
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* @param b1 - The current instance
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* @param b2 - Another BigNumber
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* @return True if current instance is less, otherwise false
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*/
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friend bool operator<(BigNumber b1, const BigNumber &b2);
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/**
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* Greater-than or equal-to operator
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* @param b1 - The current instance
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* @param b2 - Another BigNumber
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* @return True if current instance is greater or equal, otherwise false
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*/
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friend bool operator>=(BigNumber b1, const BigNumber &b2);
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/**
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* Less-than or equal-to operator
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* @param b1 - The current instance
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* @param b2 - Another BigNumber
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* @return True if current instance is less or equal, otherwise false
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*/
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friend bool operator<=(BigNumber b1, const BigNumber &b2);
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//@{
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/**
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* Assignment operator
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* @param other - The new value for the BigNumber
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* @return A BigNumber containing the new value
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*/
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BigNumber& operator=(const BigNumber &other);
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BigNumber& operator=(const long long &other);
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BigNumber& operator=(const std::string &other);
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//@}
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//@{
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/**
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* Addition assignment operator\n
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* Adds and assigns a value to the current instance
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* @param other - The value being added
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* @return The new value after addition and assignment
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*/
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BigNumber& operator+=(const BigNumber &other);
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BigNumber& operator+=(const long long &other);
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BigNumber& operator+=(const std::string &other);
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//@}
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//@{
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/**
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* Subtraction assignment operator\n
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* Subtracts and assigns a value to the current instance
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* @param other - The value being subtracted
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* @return The new value after subtraction and assignment
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*/
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BigNumber& operator-=(const BigNumber &other);
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BigNumber& operator-=(const long long &other);
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BigNumber& operator-=(const std::string &other);
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//@}
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//@{
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/**
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* Multiplication assignment operator\n
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* Multiplies and assigns a value to the current instance
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* @param other - The value being multiplied
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* @return The new value after multiplication and assignment
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*/
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BigNumber& operator*=(const BigNumber &other);
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BigNumber& operator*=(const long long &other);
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BigNumber& operator*=(const std::string &other);
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//@}
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//@{
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/**
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* Division assignment operator\n
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* Divides and assigns a value to the current instance
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* @param other - The value being divided
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* @return The new value after division and assignment
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*/
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BigNumber& operator/=(const BigNumber &other);
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BigNumber& operator/=(const long long &other);
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BigNumber& operator/=(const std::string &other);
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//@}
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/**
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* Pre-increment operator
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* @return The incremented BigNumber
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*/
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BigNumber& operator++();
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/**
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* Pre-decrement operator
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* @return The decremented BigNumber
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*/
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BigNumber& operator--();
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/**
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* Post-increment operator
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* @return The incremented BigNumber
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*/
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BigNumber operator++(int);
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/**
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* Post-decrement operator
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* @return The decremented BigNumber
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*/
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BigNumber operator--(int);
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/**
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* The index operator
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* @param index The position being looked at
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* @return The number at the specified position in the BigNumber string
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*/
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unsigned int operator[](int index);
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private:
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std::string _numberString; //The big number represented as a string
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//Methods
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BigNumber addll(const long long &other);
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BigNumber addstr(const std::string &other);
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BigNumber subtractll(const long long &other);
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BigNumber subtractstr(const std::string &other);
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BigNumber multiplyll(const long long &other);
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BigNumber multiplystr(const std::string &other);
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BigNumber dividell(const long long &other);
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BigNumber dividestr(const std::string &other);
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};
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#endif |